Why Khloe Kardashian Invited Blac Chyna to Her Birthday Party

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Khloe Kardashian is taking steps to make Blac Chyna feel more like family.

The reality star tries to make amends with Rob Kardashian's fiancee on this week's Keeping Up With the Kardashians, after the two got off to a rocky start due to the unexpected way she found out about her younger brother's romance.

WATCH: Rob Kardashian Opens About His 'Dark Days,' Says the Moment He Met Blac Chyna, He 'Wanted to Be More Than Friends'

"[Chyna] and Rob are fighting or whatever," Kim Kardashian West tells her sister Khloe in a preview clip. "I get it. He's not the easiest person on the planet to deal with."

"Maybe if she felt like we were all inviting her to your party, she would feel more accepted," Kim adds. "I think she feels like you don't like her."

"Obviously when Rob first told me about his relationship with Chyna, how I first found out, it just wasn't on good terms," Khloe shares. "But I don't really know Chyna ... and I wanna change that."

WATCH: Khloe Kardashian Worries Rob 'Will Go Into Hiding Again' After Arguing With Blac Chyna

"I want to make everything happy and that we're all just accepting of one another," Khloe explains.

And it turns out the olive branch worked!

Over the phone, Chyna happily accepts Khloe's invitation, saying, "I'm so down."

WATCH: Khloe Kardashian and Lamar Odom Warn Rob About Marrying Blac Chyna: 'Marriage Ain't Easy'

"I am so happy that Chyna has agreed to come to my birthday party," Khloe shares. "I think this is a great step in such a positive direction."

Watch the clip below.

As we know, Chyna -- and Rob, who was initially not expected to go -- attended Khloe's birthday bash in June, and everyone looked like one, big, happy family as they posed for photobooth pics and Snapchat videos.

WATCH: Blac Chyna Says Her Child With Rob Kardashian Won't Have a 'K' Name, Calls Ex Tyga 'Kinda Cheap'

Meanwhile, Rob opened up about his pregnant bride-to-be this week, crediting Chyna for getting him through his "darkest times."

"I wasn't happy in my own skin. I missed out on so many things," the formerly reclusive Kardashian brother shared with People. "From the moment we met, I knew I wanted to be more than friends. She was someone I reached out to for advice. She would cook for me and we'd just talk. She's surrounded me with a lot of positivity."

Watch the video below.